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    Antenna
    1.
    发明公开
    Antenna 失效
    ANTENNE。

    公开(公告)号：EP0637093A1

    公开(公告)日：1995-02-01

    申请号：EP94305642.4

    申请日：1994-07-29

    申请人： NIPPON ANTENNA CO., LTD.

    发明人： Ueda, Shigeo, c/o Nippon Antenna Co. Limited ,  Kamiya, Akio, c/o Nippon Antenna Co. Limited ,  Onoda, Masahide, c/o Nippon Antenna Co. Limited

    IPC分类号： H01Q5/02 ,  H01Q23/00

    CPC分类号： H01Q23/00 ,  H01Q5/321

    摘要： A roof antenna capable of receiving three kinds of bands, i.e., a FM radio band, an AM radio band, and a wireless-telephone band, includes an antenna element 10 having a structure that a conductor 15 winds around the insulator 16 in the form of a coil. A molded portion 14 is formed at the bottom of the antenna element, in which a trap coil is inserted. The electric length from the antenna top 11 to the internal metal fitting 17 at the lower end of the antenna element 10 is about a quarter of a FM radio wave. The electric length from the internal metal fitting 17 to the lower end of the trap coil 12 is about a quarter of a wireless telephone wave. A cover 19 supporting a basal part of the antenna element installs the first substrate 20 and the second substrate 21. The first substrate 20 and the second substrate 21 have a matching circuit, branching filters, and amplifiers.

    摘要翻译： 能够接收三种频带的屋顶天线，即FM无线电频带，AM无线电频段和无线电话频带，包括天线元件10，其具有导体15以绝缘体16的形式卷绕的结构 的线圈。 模制部分14形成在天线元件的底部，其中插入有捕获线圈。 从天线顶部11到天线元件10下端的内部金属配件17的电长度约为FM无线电波的四分之一。 从内部金属配件17到陷阱线圈12的下端的电长度约为无线电话波的四分之一。 支撑天线元件的基部的盖19安装第一基板20和第二基板21.第一基板20和第二基板21具有匹配电路，分支滤波器和放大器。